Me again!
Now that I see your creation framed, I am even more impressed. Another thing which helps me a little now and a lot later is my modular, removable and hinged roof nest box. You will probably need to go to my web site linked below to see how and why they are made this way.
You could add these later, even after the chicks move in. All you have to do is decide where you want to cut the hole, slide them in and secure them to the inside. Then you can clean the nest boxes, fill in more bedding and raid the eggs from outside the coop. You might have to give up a window for all the nest boxes you need.
Keep the pictures coming.